From: Israel Rukshin <israelr@mellanox.com>
Date: Sun, 13 Oct 2019 19:57:33 +0300
Subject: [PATCH] nvmet: add unlikely check at nvmet_req_alloc_sgl
Git-commit: e522f446027845e3c8b563d021f37e8f3d30c9d9
Patch-mainline: v5.5-rc1
References: bsc#1169045
The call to sgl_alloc shouldn't fail so add this simple optimization to
the fast path.
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
drivers/nvme/target/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index 3a67e244e568..6b39cfc6ade1 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -966,7 +966,7 @@ int nvmet_req_alloc_sgl(struct nvmet_req *req)
}
req->sg = sgl_alloc(req->transfer_len, GFP_KERNEL, &req->sg_cnt);
- if (!req->sg)
+ if (unlikely(!req->sg))
return -ENOMEM;
return 0;
--
2.16.4